Essential Operators(C++ Programming ) Questions and answers for exam Preparation

What is the output of this program?

1.
#include
2.
using namespace std;
3.
int main()
4.
{
5.
int a = 20;
6.
int b = 10;
7.
int c = 15;
8.
int d = 5;
9.
int e;
10.
e = a + b * c / d;
11.
cout

50
60
70
90

Explanation:-

Answer: Option A. -> 50

Explanation:In this program, the value e is evaluated by precedence ad we got the output as 50.
Output:
$ g++ ess4.cpp
$ a.out
50

Question 2.

Which operator is having the highest precedence in c++?

array subscript
Scope resolution operator
static_cast
dynamic_cast

Explanation:-

Answer: Option B. -> Scope resolution operator

None.

Question 3.

What is the name of | operator?

sizeof
or
and
modulus

Explanation:-

Answer: Option B. -> or

| operator is used to find the 'or' of given values.

Question 4.

What is the associativity of add(+);

right to left
left to right
both of these
None of the mentioned

Explanation:-

Answer: Option B. -> left to right

None.

Question 5.

What is the output of this program?

1.
#include
2.
using namespace std;
3.
int main()
4.
{
5.
int a = 0;
6.
int b = 10;
7.
if ( a && b )
8.
{
9.
cout

true
false
error
None of the mentioned

Explanation:-

Answer: Option B. -> false

&& is called as Logical AND operator, if there is no zero in the operand means, it will be true

Question 6.

What is the output of this program?

1.
#include
2.
using namespace std;
3.
int main ()
4.
{
5.
int a, b, c;
6.
a = 2;
7.
b = 7;
8.
c = (a > b) ? a : b;
9.
cout

2
7
9
14

Explanation:-

Answer: Option B. -> 7

We are using the ternary operator to evaluate this expression. It will return first option, if first

condition is true otherwise it will return second
Output:
$ g++ ess1.cpp
$ a.out
7

Question 7.

What are the essential operators in c++?

+
|
All of the mentioned

Explanation:-

Answer: Option D. -> All of the mentioned

None.

Question 8.

What is the output of this program?

1.
#include
2.
using namespace std;
3.
int main ()
4.
{
5.
int a, b;
6.
a = 10;
7.
b = 4;
8.
a = b;
9.
b = 7;
10.
cout

a:4 b:7
a:10 b:4
a:4 b:10
None of the mentioned

Explanation:-

Answer: Option A. -> a:4 b:7

In this program, we are reassigning the values of a and b because of this we got the output as a:4 b:7
Output:
$ g++ ess.cpp
$ a.out
a:4 b:7

Question 9.

In which direction does the assignment operation will take place?

left to right
right to left
top to bottom
None of the mentioned

Explanation:-

Answer: Option B. -> right to left

In assignment operation, the flow of execution will be from right to left only.

Question 10.

Pick out the compound assignment statement.

a = a - 5
a = a / b
a -= 5
None of the mentioned

Explanation:-

Answer: Option C. -> a -= 5

When we want to modify the value of a variable by performing an operation on the value currently

stored, We will use compound assignment statement. In this option, a -=5 is equal to a = a-5.